Therapy planning system for neutron capture therapy

Abstract

Provided is a therapy planning system for neutron capture therapy performing therapy planning thereof irradiating an irradiation target with a neutron beam. The system includes an image acquiring unit acquiring an image of the irradiation target; a body outline setting unit setting a body outline of the irradiation target based on the image acquired by the image acquiring unit; a vacancy region setting unit setting a part where a value of a pixel of the image is within a range set in advance on an inner side of the body outline set by the body outline setting unit, as a vacancy region including a vacancy; and a mucosa region setting unit setting apart on an outer side by a first thickness from a surface of the vacancy region set by the vacancy region setting unit on the inner side of the body outline, as a mucosa region including mucosa.

What is claimed is: 
     
         1 . A therapy planning system for neutron capture therapy performing therapy planning of the neutron capture therapy in which an irradiation target is irradiated with a neutron beam, the therapy planning system comprising:
 an image acquiring unit configured to acquire an image of the irradiation target;   a body outline setting unit configured to set a body outline of the irradiation target based on the image acquired by the image acquiring unit;   a vacancy region setting unit configured to set a part in which a value of a pixel of the image is within a predetermined range on an inner side of the body outline set by the body outline setting unit, as a vacancy region in which a vacancy is disposed; and   a mucosa region setting unit configured to set a part on an outer side of the vacancy region by a first thickness from a surface of the vacancy region set by the vacancy region setting unit on the inner side of the body outline, as a mucosa region in which mucosa is disposed.   
     
     
         2 . The therapy planning system for neutron capture therapy according to  claim 1 , further comprising:
 a bone region setting unit configured to set a part in which a bone is disposed on the inner side of the body outline, as a bone region; and   an organ region setting unit configured to set a part in which an organ is disposed on the inner side of the body outline, as an organ region,   wherein the mucosa region setting unit deletes a part of the set mucosa region overlapping at least one of the bone region and the organ region from the mucosa region.   
     
     
         3 . The therapy planning system for neutron capture therapy according to  claim 1 , further comprising:
 a skin region setting unit configured to set a part on an inner side of the body outline by a second thickness from the body outline, as a skin region in which skin is disposed.   
     
     
         4 . The therapy planning system for neutron capture therapy according to  claim 1 , further comprising:
 an air region setting unit configured to set an entire region on the outer side of the body outline, as an air region.